Application information

CLT3-4B

8/13

The CLT3-4 and the 24 V bus power supply have the same ground COM = GND. The

reverse polarity of the power supply will shutdown the device. And the power supply resistor

than 0.2 W.

Then, the whole module supply voltage rating is extended to from 0 to 30 V to -30 to +30 V.

2.3

EMC considerations

Figure 9 gives a typical application diagram where output capacitors are used to increase

CLT device immunity against fast transient bursts.

Figure 11 gives the printed circuit board layout associated with this schematic.

Refer to AN2527 for EMC considerations.

Figure 9.

Robust application diagram

R

I

24V

SUPPLY

R

I

R

I

R

I

R

C

V

IN

V

I

V

CC

V

C

COM

COM

IN

1

ESD

12

IN

2

OUT

1

OUT

2

OUT

4

OUT

3

COM

34

ESD

34

COM

COM

IN

3

IN

4

COM

12

V

C

ESD

C

COM

COM

1

V

I

1

12

2

1

2

3

12

C

C

1

12

2

1

2

3

12

C

C

2 wires sensor

3 wires sensor

Contact switch

2 wires sensor